00338nam a2200121Ia 4500082001700000100003900017245007000056260003000126300000900156490004100165500000500206700000500211  a312bUn58.PR  aUnited Nations. Statistical Office  aPrinciples and recommendations for national population censusesb  aNew YorkbThe Auth.c1958  a29p.  aStatistical papers, series M. no. 27  a  a